Question

is the following biconditional true? a triangle is acute if and only if it has an angle measuring less than 90 degrees. yes no

Explanation:

Step1: Recall acute - triangle definition

An acute - triangle has all angles less than 90 degrees.

Step2: Analyze the biconditional

The given statement says a triangle is acute if and only if it has an angle measuring less than 90 degrees. But having just one angle less than 90 degrees does not make a triangle acute. For example, a right - triangle has one angle equal to 90 degrees and two angles less than 90 degrees, and it is not acute. A triangle is acute when all of its three angles are less than 90 degrees.

Answer:

no